V. Rack Aluminum Hot Tandem Rolling Deviation Mechanism

One of the major problems that puzzled every strip mill during hot continuous rolling is camber. Camber is the longitudinal curvature of strip which develops during rolling. Camber can bring up the quality issues like strip snap and strip asymmetry when reeling. Strip steering in strip tail can reduce success rate of strip. What's more, strip camber can also bring up some equipment malfunction like trimmer malfunction and work roll damage. When camber is very serious, it can even cause security accident and bring up production stop. In this paper, the phenomenon of camber in the "1+4" hot continuous rolling line in one of the domestic strip mill is studied.Firstly, on the basic of rolling theory, the asymmetry inducements which can cause strip camber are concluded, the deformation of aluminum strip and mill under asymmetry inducement is studied, and the steering trace of strip is also studied.Finite Element Method has the superiority in field of rolling simulation. With MSC.Marc software and according to the practical process parameters and equipment parameters during hot continuous rolling of aluminum alloy 1235, Chapter 3 establishes a three-dimensional thermo-mechanical coupled elastic-plastic FEM model. The phenomenon of strip rolling when under different asymmetry inducements with the help of finite element method, and the correctness of simulation results was verified by an experiment.Finally, by data reduction and analysis of those simulation results, the mechanic parameter which is controllable and visible was found out, which can be used to reflect the present camber size and to correct camber.